    .clear::after {
      content: "";
      display: block;
      clear: both;
     }
    *{
        margin: 0;
        padding: 0;
        list-style: none;
        
      }
    
      .row{
        margin: 0;
      }
      
      .shouhang {
        background-color: rgba(50,54,67);
        height: 80px;
        line-height: 80px;
        box-sizing: border-box;
        color: white;
      }
      .icon-ziliaoku {
        float: left;
        margin:0 10px 0 25px;
      }
      .shouhang>p {
        float: left;
        font-size: 25px;
        margin-bottom: 0;
      }
    
      .caidan {
        padding: 0;
        color: white;
        background-color: rgba(50,54,67);
        font-size:20px;
        line-height: 50px;
        cursor: pointer;
        box-sizing: border-box;
        border: 1px solid rgba(50,54,67);
       
      }
      .caidan p{
        border-top: 0.05px solid white;
        border-bottom: 0.05px solid white;
        margin-bottom: 0;
        text-align: center;
      }
      .caidan a{
        color: white;
        text-decoration: none;
      }
        .caidan p:hover {
          background-color: rgb(253,189,4);
          color:black;
        }
        .suoyin {
          height: 30px;
          margin-top:30px;
          margin-left:20px
        }
        .suoyin>div>p>a{
          color: rgb(153,153,153);
          text-decoration: none;
        }
        .suoyin>div>p>a:hover{
          color:rgba(202,150,2)
        }
        .suoyin>div>p>span>a{
          color: rgb(153,153,153);
          text-decoration: none;
        }
        .suoyin>div>p>span>a:hover{
          color:rgba(202,150,2)
        }
        .btns {
          margin-top:20px;
          margin-left:85%;
          font-size:18px
        }
        .yellow {
          background-color: rgba(253,189,4);
          width: 50px;
          height: 30px;
          line-height: 30px;
          cursor: pointer;
          text-align: center;
          float: left;
          border-radius: 5px;
        }
        .change {
          background-color: rgba(253,189,4);
          width: 50px;
          height: 30px;
          line-height: 30px;
          cursor: pointer;
          text-align: center;
          border-radius: 5px;
          margin-left: 10px;
          display: none;
        }
        .btns>div:nth-of-type(2) {
          margin:0 10px
        }
        .btns>div:nth-of-type(3) {
          background-color: rgba(255,0,0);
          width: 50px;
          height: 30px;
          line-height: 30px;
          cursor: pointer;
          text-align: center;
          float: left;
          border-radius: 5px;
        }
        .kuang {
          margin: 26.5px 20px auto 20px;
          border:1px solid black;
        }
        .banner_1>p{
          margin:20px 0 0 20px; 
          float: left;
          font-size: 17px;
        }
        .kuang>.banner_1>div {
          float: left;
          background-color: rgba(4,4,207);
          color: white;
          width: 50px;
          height: 30px;
          line-height: 30px;
          cursor: pointer;
          text-align: center;
          margin:20px 0 0 84.2%;
          border-radius:5px;
        }
        .btns>div:first-of-type:hover {
          background-color: rgba(202,150,2);
        }
        .btns>div:nth-of-type(2):hover {
          background-color: rgba(202,150,2);
        }
        .btns>div:nth-of-type(3):hover {
          background-color: rgba(202,150,2);
        }
        .banner_1>p{
          margin:20px 0 0 20px; 
          float: left;
          font-size: 17px;
        }
        .kuang>.banner_1>div {
          float: left;
          background-color: rgba(4,4,207);
          color: white;
          width: 50px;
          height: 30px;
          line-height: 30px;
          cursor: pointer;
          text-align: center;
          margin:20px 0 0 84.2%;
          border-radius:5px;
        }
        .kuang>.banner_1>div:first-of-type:hover {
          background-color: rgba(202,150,2);
        }
        .change:hover{
          background-color: rgba(202,150,2);
        }
        .banner_2{
          margin:20px 0 20px 20px;
          font-size: 17px;
        }
        
        .checkbox_2{
          margin: 10px 0 0 20px;
        }
        .checkbox_3{
          margin: 10px 0 0 30px;
        }
        .checkbox_4{
          margin: 10px 0 0 40px;
        }
        .checkbox_5{
          margin: 10px 0 0 50px;
        }
        
   